import type { DiscoveredProcess } from "../../types";
export declare const RESUME_BUSY_WINDOW_MS = 120000;
export declare function resolveResumeBusyWindowMs(env?: NodeJS.ProcessEnv): number;
export type BusySignal = "jsonl_mtime" | "process_argv" | "process_cwd" | "file_handle";
export interface ConversationBusyInput {
    conversationId: string;
    projectPath: string | null;
    jsonlPath: string | null;
    discovered: DiscoveredProcess[];
    now?: number;
    windowMs?: number;
    platform?: NodeJS.Platform;
    /**
     * When this streamer's own PTY for this conversation last went idle (ms epoch),
     * or null/undefined if it never owned one in this process's lifetime.
     *
     * Without this the probe cannot tell our own echo from a stranger: the normal
     * background → hold_session → foreground → resume flow releases the PTY (so the
     * hasSession early-return no longer applies) while leaving a JSONL we wrote
     * seconds ago — which would 409 the single most common resume in the product.
     * File activity at or before this timestamp is attributed to us, not a collision.
     */
    selfPtyEndedAt?: number | null;
}
export interface ConversationBusyResult {
    busy: boolean;
    detectedBy: BusySignal[];
    lastActivityMs: number | null;
    likelyOwner: "external" | "unknown";
}
export declare function conversationBusy(input: ConversationBusyInput): ConversationBusyResult;
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